Seat heater
 

Sometimes it will come on and then some times I have to turn off the key and restart it a few times until the seat heaters will come on?

Re: Seat heater
 

Define how it doesn't 'come on'.

Is it just the indicator lights next to the seat heater switch/button wont come on? If so, it may just be the switch/button is bad and doesn't work all the time.

Or is it just not getting warm right away and you're thinking it isn't working? It does take a little while for it to warm up or feel it.

Re: Seat heater
 

they will not heat up nor will the display light on the switch. If I turn the iignition on and off they eventually come on

Re: Seat heater
 

Assuming you are not trying to get them to go on while the vehicle is not started? They will not come on unless the engine is running to avoid rapid battery drain.

Re: Seat heater
 

No it is running its just sometimes they come on and sometimes they dont

Re: Seat heater
 

And they both react the same way? Or are you only trying the one side?

What about the back?

If they both react the same way its doubtful both are faulty at the same time, although coincidentally, it could happen.
Probably the switch not working right or you are doing something wrong.

Read the manual again to make sure you aren't pressing the back heater, then the back and butt heather or you are pressing it three times and shutting it off and thinkings it not working.

Sorry, just without seeing it personally its hard to figure out whats wrong other than "user error". No offense.

Re: Seat heater
 

Its either all or none. If they work the front and back work if not none of them do

Re: Seat heater
 

Then maybe fuse? I'm not sure if they're all on the same fuse. Other than that it could only be an electrical problem in the whole truck.

Re: Seat heater
 

Not any help but I had the same issue in a Suburban. Never did figure it out but same symptoms. Eventually they worked again without issue. My only guess was that I had either a self curing short or water issue?

Re: Seat heater
 

when they do work try moving your weight around in the seat or bouncing in the seat, if they shut down you likely have an intermittant open in the seat element which will disable the entire system Scanning for codes would be a big help

Re: Seat heater
 

Humtech-

My driver side comes on and off intermittently. I've searched and found an so many opinions if I followed them all I'd be replacing the entire driver side seat and wiring harness with module.

Do you have any info on where to start?

Re: Seat heater
 

Start by scanning seat module for codes, if its acting up should set a code then we can go from there

Re: Seat heater
 

Thanks!

To be clear, this would be done at the dealer at the actual module under the seat?

I have a code reader, but I'm guessing this ain't the tool you're talking about.

Re: Seat heater
 

Tech 2 would be my first choice which is a dealer tool. Any good scanner that can read body codes will do. Most code readers will only read powertrain codes so that wont pick it up

Re: Seat heater
 

You know that viper has the capability to turn on your heated seats.... Alot of people dont know how to activate it or thats its even there.

Re: Seat heater
 

My Viper Smart Start? Do tell more......

Re: Seat heater
 

There is a temp sensor in the viper module. It can be set to automatically start the vehicle and run for x amount of time below x temp. Also below x temp, remote start will activate the seat heaters. Number of other odd features no one ever uses. Timed delay shutoff to cool down turbos, etc.

Think mine is set around 42-45 degrees for the seat heaters to turn on. Pretty damn nice option. Hvac may not be up to temp, but the seats warm up pretty quick.

You need the programmer to access those features. I believe this is all done through the bypass module. You might want to try disconnecting that while you are troubleshooting. If you had that remote start installed, I'd check w your installed before you start yanking ****.

Re: Seat heater
 

I've had the Viper for a couple years before the seat heater issue.

I'm aware of all of the functions you mention. I actually requested to have the temp turn on feature activated and Best Buy told me it would not work with the Hummer.

As far as the seat heater auto on, where did you get that info?

I'm pretty thorough when reading about features and have messed with all of them on this Viper. I even have a note in my Outlook that syncs with my phone and lists all the remote key fob codes I thought I'd use.

There is also an option to start if voltage dips below a certain level..... doesn't work on mine.

Re: Seat heater
 

I've always had "a guy" do all my stereo/remote start ****, so I never really got in balls deep.

There are bypass units that directly plug into the truck and can communicate w/ the bus and there are ones that get cut into the factory harness....old school way.

Doesn't sound like you have the one that will communicate w/ the bus. If so, then you can eliminate the remots start from the possibility list.

Re: Seat heater
 

I am 'that guy' but the last few years I just haven't felt like diving in like I used to.

Yet another example of 'if you want **** done right, your gotta do it yourself'.